P
R
E
L
I
M
I
N
A
R
Y
I
N
F
O
R
M
A
T
I
O
N
XpressFlow-2020 Series –
Ethernet Switch Chipset
SC220
XpressFlow Engine
Pin No(s).
Symbol
Type
Name & Functions
CAM Interface
214,215,217,218,219, C_D[15:0]
220,221,222,223,225,
TTL I/O-TS CAM Interface – Data Bus bit [15:0]
(5VT)
226,228,229,220.221,
239
241
233
234
236
C_WE#
C_CE#
C_EC#
C_CM#
C_FF#
CMOS Output CAM Interface – Write Enable
CMOS Output CAM Interface – Chip Enable
CMOS Output CAM Interface – Enable Comparison
CMOS Output CAM Interface – Data/Command Select
TTL Input
(5VT)
CAM Interface – Full Flag
237
C_MF#
TTL Input
(5VT)
CAM Interface – Match Flag
Test & Reserved Pins
65
TEST
n/c
CMOS I/O-TS Test Pin – Set Test Mode upon Reset,
and provides test status output during
test mode
62,63,64,67,242
---
Reserved Pins (5 pins)
Power Pins
32,78,115,161,206,243 VDD (Core)
Input
Input
+3.3 Volt DC Supply for Core Logic (6
pins)
7,20,31,44,55,68,76,86, VDD
94,102,110,120,144,
+3.3 Volt DC Supply for I/O Pads (23
pins)
152,162,170,178,186,
197,216,227,238,252
35,81,112,158,209,240 VSS (Core)
Input
Input
Ground for Core Logic (6 pins)
Ground for I/O Pads (26 pins)
4,17,28,41,52,61,66,74, VSS
83,91,99,197,117,127,
136,147,155,165,173,
181,188,200,213,224,
235,249
© 1998 Vertex Networks, Inc.
6
Rev. 4.5 – February
1999
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
